main(){

    1. // build and compile our shader program
    2.     // ------------------------------------
    3.     // vertex shader
    4.     unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
    5.     glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
    6.     glCompileShader(vertexShader);
    7.     // check for shader compile errors
    8.     int success;
    9.     char infoLog[512];
    10.     glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
    11.     if (!success)
    12.     {
    13.         glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
    14.         std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" << infoLog << std::endl;
    15.     }
    16.     // fragment shader
    17.     unsigned int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
    18.     glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
    19.     glCompileShader(fragmentShader);
    20.     // check for shader compile errors
    21.     glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
    22.     if (!success)
    23.     {
    24.         glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
    25.         std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n" << infoLog << std::endl;
    26.     }
    27.     // link shaders
    28.     unsigned int shaderProgram = glCreateProgram();
    29.     glAttachShader(shaderProgram, vertexShader);
    30.     glAttachShader(shaderProgram, fragmentShader);
    31.     glLinkProgram(shaderProgram);
    32.     // check for linking errors
    33.     glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
    34.     if (!success) {
    35.         glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
    36.         std::cout << "ERROR::SHADER::PROGRAM::LINKING_FAILED\n" << infoLog << std::endl;
    37.     }
    38.     glDeleteShader(vertexShader);
    39.     glDeleteShader(fragmentShader);

    while (!glfwWindowShouldClose(window)){

    1. glUseProgram(shaderProgram);